Last



FREDERICK JOHN SHANISEY, SE,

OF ROCHESTER, NEW YORK, ASSIGNOR TO FITZ- EMPIRE' DOUBLE PIVOT LASTCOMPANY, OF AUBURN, MAINE, A CORPORATION OF MAINE.

LAST.

Application filed February 7, 1918.

To all whom it may concern Be it known that I, FREDERICK J. SHAN- ISEY,Sn, a citizen of the United States, residing at Rochester, in the countyof Monroe and State of New York, have invented certain Improvements inLasts, of which the following description, in connection with theaccompanying drawings, is a specification, like reference characters onthe drawings indicating like parts 1n the several figures.

This invention relates to collapsible lasts, and in particular tolastshaving a separate heel block arranged to move relative to the forepartabout a fixed or moving center, and which are commonly calledhinge-lasts. Collapsible lasts of one common type offer a resilientresistance tomovement' from either extended or collapsed position.Collapsible .lasts'o-f another type offer such resistance only tomovement from extended position and tend to return to extended positionwhen broken or collapsed. It is an important object of my invention toprovide a last which, without sacrifice of other important advantages,will have the characteristic advantages of both of these types andwhich. is transformable from one type to the other, and importantfeatures of the invention consist in such an organization.

Heretofore great difliculty has been'experienced with collapsible lastsin securing the" requisite strength in connection 'Wlth cheapness ofconstruction and rapid shortening action.

Accordingly, it is a further object of my invention to provide ahingelast which shall have the above-discussed and other advantages whileavoiding the disadvantages of'heretofore known hinge-lasts.

To this end a' feature of the inventionconsists in a two-part lasthaving a substantially horizontal joint surface preferably located inthe vertically central portion of the last to enable the last to resistvthe stresses imparted by the leveling machine, and provided with a pinand slot hinge connection such as to enable the last to be shortenedeasily and rapidly.

These and other features of the inven-' tion, comprising certainarrangements and combinations of parts will be understood from thefollowing description of a preferred embodiment of the invention, se-

Serial No. 215,782.

lected for purposes of illustration and shown 111 the drawings in which,

Figs. 1 and 2 are views of the last extended and collapsed respectively;and

Figs. 3 and 4 are similar views of a different .form of the last showingthe plates in reversed position for the sake of clearness.

The last shown is of the two-part form having a forepart 10 and a heelpart'12. A part of the cone of the last is removed as at 1%, to permitcollapsing aswill be well understood. The joint surface on the forepartcomprises a substantially horizontal portion 16, located about midway ofthe vertical dimension of the last, and a portion .18 extendingdownwardly and backwardly to the tread surface of the last. Theheel-part has two corresponding surfaces 20, 22, cut to fit the surfaces1,6, 18, respectively, the surfaces 16, 20 forming abutting shoulderswhen the last is extended.

The two last parts are joined by a plate 24, firmly anchoredpreferably-in the heel part by rivets 26, and having two slots 28, 30,arranged at a large angle. with each other. Two pins 32, 84 in theforepart engage in the slots. The last being in ex;- tended position,the left end of the slot 30 is closer to thepin 34: than the right end.As the heel pai tlswings up and the pin 34 moves to the right in theslot 30, the pin 32 will drop toward the bottom of the slot 28. Thisgives the plate-24c and the heel part carried by it a rotary movementabout a continually moving center, or in other words, movement ofcombined translation and rotation, lifting the heel part and turning anddrawing it forward to. collapse the last} A very rapid and efficientshortening action is produced, as indicated in. the

dotted lines in Figs. 2 and 4, which show several successive positionsof the heel part. The relation between the cuts 1620 and 18 22 and, thebonding mechanism is an imintermediate the, ends of said cuts, such as Ithe shoulders formed at 16 -20 in thedrawing. M It is advisable thatthehorizontal cut 16-20 be located well up in the last in order to securethe requisite strength, particularly against the twisting stresses ofthe leveling operation. When the heel part of a hinge last of heretoforeknown construction swings about a fixed center, the center is preferablyplaced high in the last for the sake of strength, and the shorteningaction is very slow (and in some lasts is even negative) at itsbeginning. If the fixed center were to be located low in the last, theadditional disadvantage would be incurred of having to slope the cut1822 so far to the rear, in order to permit the surface 22 to clear thehigh corner 35, that either the heel plate must be shortened or else thewhole joint moved forward in the last. For practical reasons, neitherprocedure is feasible. In the last of the present invention, the raisingof the plate 24 by the co-action of the slots 28, 30 on the pins, onables the upper portion of the surface 22 to clear the corner 35 withoutundue sloping of the cut 18-22, and at the same time the heel part iscarried forward rapidly from the beginning of the collapsing movement,the slot 28 being incliiied to the vertical in the forwarddirection, sothat every movement of every portion of the heel part has a substantialforward component.

Since the plate 24 is rigidly connected to the heel part, any movementsof said plate relatively to the forepart are necessarily transmitted tothe heel part. The movements hereinbefore described, desirable in orderto clear the corner 35 without undue sloping of the faces 1822, areobtained by the two guides provided respectively by the co-action ofslot 30 with pin 34 and the coaction of slot 28 with pin 32. The lowerguide 28-32 is nearly vertical and the upper guide 3034 is directlyabove it and is at such angle relatively thereto that at the very startof relative movements of the fore and heel parts from extended towardcollapsed positions the distance between the lower rivet 26 and the pin34 begins to lessen and the last begins to shorten. and at the same timethe slot 28 begins to move up along pin 32 caused by the upper slot 30riding along pin 34. This causes the entire H plate 24 to begin to rise,thus lifting the heel part amply to clear the corner 35 as described.These movements continue until the last is collapsed.

Means for locking or holding the last parts in relative position isprovided, comprising a plate 36. pivotally mounted on the lower pin 26and lying beside and in contact with the plate 24. It carries near itsforward end a projection 38, sloping oif into two cam-shaped depressions40. 42, one on each side. A roller 44 is mounted on the pin 34 and formsa bearing co-operating with the project on 38. The roller seats in oneor other of the depressions when the heel part is in either extremeposition.

The plate 36 is resiliently held in contact with the roller 44 by aspring 46. r The spring 46, the diameter of which is less than thecombined thickness of the plates 24 and 36, is mounted in twooverlapping holes 48, 50 in the plates 24 and 36, respectively. The holein the plate 36 is lower than the hole in the plate 24, so that a spring46 placed in the holes will rest against the plate 36 with its upper endand the plate 24 with its lower end. This will always hold the plate 36pressed firmly against the roller 44 in either position of the heelpart. It is -to be noted that no additional boring and consequentweakening of the last is necessary in order to insert this spring, whichis not thicker than the two plates combined.

The forepart of the last may be bored at 52 to receive a spring 54arranged to engage a projection 56 on the plate 36, or a projection 58on the plate 24. One plate is shown without its projection on each sheetof the drawings for the sake of clearness in illustration. In the formercase the spring 46 may be dispensed with, if desired, (and isaccordingly not shown on Figs. 3, 4) and in either case, since the lineof action of the spring 54 lies above the pin 32, the spring 54 willforce the last back into extended position from collapsed position,without attention on the part of the operator, and irrespective of thetendency of the locking member 36 to hold the last in collapsedposition.

I have thus provided a last which can be made resiliently self-extendingor can be made to oppose movement from either eX- tended or collapsedposition by the simple expedient of inserting or removing the spring 54.

Having thus described my invention,what I claim as new and desire tosecure by Letters Patent of the United States is 1. In a collapsiblelast, a hinge mechanism constructed and arranged to offer substantialresistance to initial movement from collapsed position, and means actingautomatically to return the last parts from collapsed to extendedposition, said means being removable when desired to permit the freeaction of the elements offering resistance to movement of the lastparts.

2. In a collapsible last, a hinge mechanism constructed and arranged toofier resilient resistance to movement from col.- lapsed to extendedposition and means constructed and arranged to supply the forcenecessary to overcome the resistance to movement from collapsedposition. said means being removable when desired to permit the freeaction of the elements offering resistance to movement of the lastparts.

3. A collapsible last haying hinge mechanism, means for holding the lastin extended position and for holding it in fully collapsed position, andmeans operating to inhibit the latter function of the holding means.

4. A collapsible last comprising hinge mechanisms constructed andarranged resiliently to resist movement from either ex tended orcollapsed position, and means for causing the last, nevertheless, toreturn automatically to extended position when collapsed, saidmeansbeing removable when desired, whereby the said normal operation of thehinge mechanism is secured.

5. In a two-part last, a hinge plate rigidly mounted in one last part,and having a slot, a pin mounted in the other last part and engaging inthe slot, the pin and slot being constructed and arranged to guide theheel part in a combined rotational and translational movement tocollapse the last, and a second plate pivotally mounted in the formerlast part, arranged to engage the pin resiliently and to tend to holdthe last in one of its two positions, and a removable means forautomatically returning the last from collapsed to extended position.

6. In a two-part collapsible last, a hinge connection constructed andarranged to swing the heel part on the forepart by a combined movementof translation and rotation, to shorten the last, an abutment mounted inone last part and a member pivotally mounted in the other last part andconstructed and arranged to engage the abutment and to tend to hold thelast in one of its two positions, and means for automatically returningthe last from collapsed to extended position.

7. In a hinge-last, a forepart having a joint surface comprising asubstantially horizontal portion and a. portion extending downwardly andrearwardly at an angle thereto approximately half the thickness of thelast to the tread face, the heel part having a correspondingly arrangedsurface and a horizontal overhanging surface arranged to fit the saidsurfaces on the forepart, and a hinge plate fastened rigidly in the heelpart and having two slots, and pins in the forepart engaging in theslots, the slots being constructed and arranged in such manner as tocause the plate to rise and turn forward simultaneously about the pinsto collapse the last, and the downwardly extending joint surfaces beingconstructed and arranged so that the heel part surface will clear thecorner between the two said forepart surfaces as the last collapses.

8. In a two-part last, a hinge plate rigidly mounted in one of the lastparts and having a slot, a pin in the other last part engaging in saidslot, the slot and pin being constructed and arranged to permit the heelpart to rotate and slide forward, in combination with a holding. memberpivotally mounted in the heel part of the last and having a portionconstructed and arranged to engage the pin to hold the last in collapsedor extended position.

9. In a two-part collapsible last, a hinge connection constructed andarranged to permit swinging of the heel part on the forepart by acombined movement of translation and, rotation, to shorten the last, anabutment mounted in one last part independent of the hinge connectionand a member pivotally mounted in the other last part and constructedand arranged to engage the abutment and resiliently hold the last incollapsed or extended position.

10. A hinge last having a slot in each part, a hinge plate and a holdingplate mounted side by side in the slots, the plates having slightlynon-registering apertures and a spring in the apertures bearing againstopposing sides in the two apertures for controlling the holding member.

11. A convertible hinge last comprising a hinge mechanism having amember constructed and arranged to tend to hold the last resiliently inextended or collapsed position, and a removable member normally actingto overcome the tendency of the said firstnamed member to hold the lastin collapsed position.

12. A convertible hinge last having a forepart, a heel part, a hingemechanism uniting said parts, an abutment on one last part, and a memberon the other last part arranged resiliently to engage the abutment intwo positions to tend to hold the last in collapsed and extendedpositions, respectively, and a spring, operating to move the lastautomatically from collapsed to extended position, said spring beingremovable to permit normal action of the remaining last parts.

13. A convertible hinge last having a hinge mechanism constructed andarranged in itself to extend the last automatically from collapsedposition, including a member removable therefrom at will, therebyleaving a mechanism acting to hold the last resiliently in collapsedposition.

In testimony whereof I have signed my name to this specification. IFREDERICK JOHN SHANISEY, Sr.

